No I have not...I'm in the States and bikes haven't arrived yet, so no test ride. Yes, that may sound premature to say before test riding one, but almost always the suspension is one of the first upgrades that really makes a difference, unless the bike is already high spec with very good components. It's not jsut the quality of the suspension but having front and rear spec'd for your weight, and riding style.
I know the suspension on my V7 stone was **** stock. I upgraded significantly in the rear and, while it was expensive, it was worth it. I put Matris twin shocks in the back which were about $1100USD, but the front only needed a fork kit from Matris that just replaces the internals at around $250-$350USD depending on if you need a new spring. Completely changes the handling of the bike. Also, having compression, preload, damping options vastly improves the ability to dial it in just right, couple that with a setup designed for your weight and it's the best investment.
The stock setup might be adequate, especially for riders within it's weight limits. I'm pretty light so I might be able to dial in the rear ok in the beginning, but eventually I will upgrade.